Monitoring Expert

Logging (Node.js)

// Using Pino (fast)
import pino from 'pino';

const logger = pino({
  level: process.env.LOG_LEVEL || 'info',
  transport: process.env.NODE_ENV !== 'production' 
    ? { target: 'pino-pretty' } 
    : undefined
});

// Usage
logger.info({ userId: 123 }, 'User logged in');
logger.error({ err, requestId }, 'Failed to process');